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Diffstat (limited to 'linuxthreads/ChangeLog')
| -rw-r--r-- | linuxthreads/ChangeLog | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog index 795c064f90..121eceb83e 100644 --- a/linuxthreads/ChangeLog +++ b/linuxthreads/ChangeLog @@ -1,3 +1,37 @@ +2000-06-13 Kaz Kylheku <kaz@ashi.footprints.net> + + A few optimizations. Got rid of unnecessary wakeups of timer threads, + tightened up some critical regions and micro-optimized some list + manipulation code. + + * sysdeps/pthread/timer_routines.c (__timer_thread_queue_timer): + Returns int value now to indicate whether timer was queued at head. + * sysdeps/pthread/posix-timer.h: Likewise. + * sysdeps/pthread/timer_settime.c (timer_settime): Takes advantage of + new return value from __timer_thread_queue_timer to avoid waking + up timer thread unnecessarily. + + * sysdeps/pthread/posix-timer.h (timer_id2ptr): No longer checks + inuse flag, because this requires mutex to be held. Callers updated + to do the check when they have the mutex. + * sysdeps/pthread/timer_getoverr.c: Add check for inuse here. + + * sysdeps/pthread/timer_settime.c (timer_settime): Tighter critical + regions: avoids making system calls while holding timer mutex, and + a few computations were moved outside of the mutex as well. + * sysdeps/pthread/timer_gettime.c (timer_gettime): Likewise. + + * sysdeps/pthread/posix-timer.h (list_unlink_ip): Function name changed + to list_unlink_ip, meaning idempotent. Pointer manipulation + changed to get better better code out of gcc. + * sysdeps/pthread/timer_routines.c (list_unlink): Non-idempotent + version of list_unlink added here. + * sysdeps/pthread/timer_delete.c: Use appropriate list unlink + function in all places: idempotent one for timers, non-idempotent + one for thread nodes. + * sysdeps/pthread/timer_settime: Likewise. + * sysdeps/pthread/timer_routines.c: Likewise. + 2000-06-13 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/bits/posix_opt.h (_POSIX_TIMERS): Define. |